Two-time world champion Anderson Peters took the third sport with a best throw of 86.62m.
Kishore Jena's Diamond League debut ended in disappointment as he was eliminated after three rounds of throws, with 76.31m being his best. He began with a 75.72m, then fouled his second effort, before coming up with 76.31m to be at ninth after three throws each by all the 10 competitors.
The 28-year-old Jena has a personal best of 87.54m, a performance that fetched him a silver medal in the Hangzhou Asian Games last year, but it was not his day on Friday.
Vadlejch had won a silver in the Tokyo Olympics and a bronze in the 2023 World Championships, the two events in which Chopra had won gold.
Chopra had won the 2023 Doha Diamond League with a throw of 88.67m, ahead of Vadlejch (88.63) and Peters (85.88m).
The next Diamond League meeting which has men's javelin as a discipline will be in Paris on July 7.
At each DL meeting, athletes are awarded 8, 7, 6, 5, 4, 3, 2 or 1 points for ranking first to to eighth respectively. The top six javelin throwers will compete in the Diamond League Finals in Brussels on September 13-14 and the winner will lift the DL champion's trophy.
Published 10 May 2024, 18:08 IST